Epoxy resins and process for making the same

Details Epoxy resins and process for making the same Epoxy resins and process for making the same

C - Chemistry, Metallurgy

08

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C08G 59/42 (2006.01) C08G 59/02 (2006.01) C08G 59/62 (2006.01) C08G 63/19 (2006.01) C09D 5/03 (2006.01) C09D 163/00 (2006.01)

Patent

CA 2412909

An epoxy or phenolic functional polyester/polyether oligomer or polymer having a functionality of greater than 2 and comprising moieties derived from diglycidyl ethers or diglycidyl esters, anhydrides and dihydric phenols. The oligomer or polymer is prepared by (1) reacting a liquid epoxy resin (LER), along with a dihydric phenol, with a cyclic anhydride, in the presence of a catalyst, the cyclic anhydride being employed in an amount sufficient to achieve the desired functionality but insufficient to form gels in the anhydride-modified epoxy resin.

L'invention porte sur un oligomère ou polymère de polyester/polyéther à fonction époxy ou phénol, d'une fonctionnalité supérieure à 2 comportant des fragments dérivant d'esters ou d'éthers diglycidyles, d'anhydrides et de phénols dihydriques. Ledit oligomère ou polymère se prépare: (1) en faisant réagir une résine époxyde liquide et un phénol dihydrique avec un anhydride cyclique en présence d'un catalyseur, l'anhydride cyclique étant en quantité suffisante pour produire la fonctionnalité désirée, mais insuffisante pour former des gels dans la résine époxyde modifiée par l'anhydride.

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